<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item,idx) in searchResults" :key="idx" @click="gotoDetail(item)">
				<view class="goods-name">{{ item.goods_name }}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clearHistory"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, idx) in historyList" :key="idx" @click="gotoGoodsList(item)">
				</uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				kw: '',
				searchResults: [],
				historyList: JSON.parse(uni.getStorageSync('kw') || '[]')
			};
		},
		methods: {
			// input输入事件
			input(val) {
				// 做防抖处理
				clearTimeout(this.timer)
				this.timer = setTimeout(() => {
					this.kw = val,
						this.getSearchList()
				}, 500)
			},
			// 根据搜索关键词，搜索商品建议列表
			async getSearchList() {
				// 判断关键词是否为空
				if (this.kw === '') {
					this.searchResults = []
					return
				}
				// 发起请求，获取搜索建议列表
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/goods/qsearch', {
					query: this.kw
				})
				if (res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				this.saveSearchHistory()
			},
			// 跳转商品详情
			gotoDetail(item) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			},
			// 保存搜索历史
			saveSearchHistory() {
				const set = new Set(this.historyList)
				// 删除关键词
				set.delete(this.kw)
				// 加入关键词
				this.historyList = [this.kw, ...set]
				// 持久化存储
				uni.setStorageSync('kw', JSON.stringify(this.historyList))
			},
			// 清除历史
			clearHistory() {
				this.historyList = []
				uni.setStorageSync('kw', '[]')
			},
			// 跳转商品列表
			gotoGoodsList(kw) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?query=' + kw
				})
			}
		}
	}
</script>

<style lang="scss">
	.search-box {
		position: sticky;
		top: 0;
		z-index: 999;
	}

	.sugg-list {
		padding: 0 5px;

		.sugg-item {
			font-size: 13px;
			padding: 13px 0;
			border-bottom: 1px solid #efefef;
			display: flex;
			align-items: center;
			justify-content: space-between;

			.goods-name {
				white-space: nowrap;
				overflow: hidden;
				text-overflow: ellipsis;
				margin-right: 3px;
			}
		}
	}

	.history-box {
		padding: 0 5px;

		.history-title {
			height: 40px;
			font-size: 14px;
			display: flex;
			justify-content: space-between;
			align-items: center;
			border-bottom: 1px solid #efefef;
			margin-bottom: 5px;
		}

		.history-list {
			display: flex;
			flex-wrap: wrap;

			.uni-tag {
				margin-top: 5px;
				margin-right: 5px;
				background-color: #efefef;
				color: black;
				border: 0;
				font-size: 14px;
			}
		}
	}
</style>
